ul.sidenav {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    border: 1px solid #e7e7e7;
    background-color: #f3f3f3;
}

ul.sidenav li {
    float: left;
}

ul.sidenav li a, .dropbtn {
    display: block;
    color: #666;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
}


ul.sidenav li a:hover:not(.active),.dropbtn:hover {
    background-color: #ddd;
}

ul.sidenav li a.active {
    color: white;
    background-color: #4CAF50;
}

ul.sidenav li lable.active {
    color: white;
    background-color: #4CAF50;
}



.dropdown-content
{
  display:none;
  position:absolute;
  background-color:#f9f9f9;
  box-shadow:0px 8px 16px 0px rgba(0,0,0,0.2);
}

.dropdown-content a:hover {
    background-color: #ddd
}

.dropdown-content a
{
  color:black;
  padding:12px 16px;
  width:70px;
  text-decoration:none;
  display:block;
}

.dropdown:hover .dropdown-content
{
  display:block;
}